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An experimental investigation into Martian gully formation; a slush-flow model

Katherine S. Auld and John C. Dixon
An experimental investigation into Martian gully formation; a slush-flow model (in Martian gullies and their Earth analogues, Susan J. Conway (editor), J. L. Carrivick (editor), P. A. Carling (editor), T. de Haas (editor) and Tanya N. Harrison (editor))
Special Publication - Geological Society of London (2019) 467: 411-424

Abstract

To understand the potential applicability of the process of 'slush flow' (a sediment-carrying flow with water and ice) to gullies on Mars, we undertook a series of flume experiments at Earth surface temperatures and pressures, which we subsequently scaled for Mars. Experiments were conducted in a 3 X 0.5 m hinged flume filled with medium-grain-size sand. The experiments were performed over a slope angle range of 10 degrees -30 degrees , corresponding to the slope range for gullies observed on Mars. A water ice mix, or 'slush', was flowed through a 19 mm-diameter silicone hose and released onto the surface at the top of the slope. A variety of morphometric parameters were measured on each form produced in the flume. The forms produced in our experiments developed the three principal morphological components of Martian gullies: alcove, channel and apron, and had a diversity of planimetric forms. The forms produced during simulations compared well to slush flows in terrestrial arctic climates, and open up the possibility that some Martian gullies may result from slush flows associated with the thawing of permafrost-active layers or surface frost under favourable thermal regimes.


ISSN: 0305-8719
Coden: GSLSBW
Serial Title: Special Publication - Geological Society of London
Serial Volume: 467
Title: An experimental investigation into Martian gully formation; a slush-flow model
Title: Martian gullies and their Earth analogues
Author(s): Auld, Katherine S.Dixon, John C.
Author(s): Conway, Susan J.editor
Author(s): Carrivick, J. L.editor
Author(s): Carling, P. A.editor
Author(s): de Haas, T.editor
Author(s): Harrison, Tanya N.editor
Affiliation: Northwest Arkansas Community College, Bentonville, AR, United States
Pages: 411-424
Published: 2019
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 87
Accession Number: 2019-032148
Categories: Extraterrestrial geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: University of Arkansas, USA, United States
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201908
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